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Accelerating spectral atomic and molecular collisions methods with graphics processing units

机译:利用图形处理单元加速光谱原子和分子碰撞方法

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We present a computation method to accelerate the calculation of the Hamiltonian of a three-body time independent Schr?dinger equation for collisions. The Hamiltonian is constructed with one dimensional (basis overlaps) and two dimensional (interparticle interaction) integrals that are mapped into a computational grid in a Graphics Processing Unit (GPU). We illustrate the method for the case of an electron impact single ionization of a two electron atom. This proposal makes use of a Generalized Sturmian Basis set for each electron, which are obtained numerically on a quadrature grid that is used to compute the integrals in the GPU. The optimal computation is more than twenty times faster in the GPU than the calculation in CPU. The method can be easily scaled to computers with several Graphics Processing Units or clusters.
机译:我们提出一种计算方法来加速三体时间无关的薛定er方程碰撞的哈密顿量的计算。哈密​​顿量由一维(基本重叠)和二维(粒子间相互作用)积分构成,这些积分被映射到图形处理单元(GPU)中的计算网格中。我们说明了两个电子原子的电子碰撞单电离的情况下的方法。该提案利用了每个电子的广义Sturmian基础集,这些数字是在用于计算GPU中积分的正交网格上以数字方式获得的。 GPU中的最佳计算比CPU中的计算快二十倍以上。该方法可以轻松扩展到具有多个图形处理单元或群集的计算机。

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